Will_GT90

99 Civic DX auto

Stock audio other than new head unit,
Just installed new head unit and rear speakers are both not working, have hooked up a spare speaker and it also has no sound,

Anyone got any tips on how to trace this? trying to research before diving into it getting fixed tomorrow!

NVturbo

make sure the fader is balanced.....not selected for the front.

Will_GT90

Double checked, fader when set to REAR has no sound, when Equal front works but REAR is not working.


Is there a fuse for the rear speakers only that could of blown? I hooked back up my old aftermarket radio and noticed there was no sound from the rear speakers when the fade was set to the REAR or Equal the front speakers would only work.

It's almost like both rear speakers blew out simultaneously but we hooked a spare speaker up and it too would get no sound on REAR or Equal, only the front would work

NVturbo

Double-check the connections at the radio harness. The only fuse that comes with an aftermarket radio...is for the radio itself. The speaker wires are not individually fused.

joeshmo

Agree'd. It is either in your wire harness behind the stereo or there is a break somewhere in the wiring to the rear (unlikely for that to happen to both speakers at once.)

Will_GT90

Got rained out, will pull the head unit and double check, weird that when I bough the car the rears were fine but the drivers side would hiss @ high volume, then after I pull the head unit the rears aren't working

Both rear speakers are ran on seperate sides of the car, right?

Will_GT90

Update:

Last night I checked my wiring and all my solders/connections are good to the head unit from the factory harness.

I tested my rear speaker wires by hooking up a AA battery to the end with the speaker plug, and could not get a reading from the rear wires in my harness where the head unit plugs up to, I suspect this means my rear speaker wiring has gone bad/lost connection, can anyone help me out in way of a diagram or explaining how/why the rear speaker wiring isn't functioning, I fear this means I'll end up having to run brand new wires to my rear speakers but if there are multiple connection points in this harness (appears to go to my tail lights?) I would like to check them before tearing apart my only ride to fix the speakers.


Bordering on taking it to a audio specialist, but I'm willing to try and fix it if I can get some help on a diagram for the rear speaker's wire path, Thanks HT

NVturbo

If all the radio connections are good, check the wiring leading to the rear speakers...accessible from the trunk. The wires may have come loose/disconnected.

Will_GT90

I looked yesterday and it appears the speakers run into a loom that runs to the tail lights, I'll poke around more today when I can take my trunk apart and see what I can find.


So I'm thinking this isn't a very common problem? this is my first Honda and I was hoping maybe it was a general problem, hopefully it won't end up being too costly!

NVturbo

The wires should start to go up around the front of the rear tire well. Look at that area to see if the problem is there.

Will_GT90

Was raining last night, will continue today, hopefully will look threw wiring this weekend, if I'm going to run new wires would it be a good idea to use the path already in the car, and would it be a good Idea to run an amp wire at the same time? ( I will put a system in eventually)

NVturbo

You can run them on either side. There's no problem doing that with speaker wires...just the RCA's. You don't want the RCA's along side the power wire.

fcm

First thing I would do is confirm you have the correct "pairs" of leads for the left and right rear speakers, not a pos.(+) of one and a neg.(-) of the other.

RR+ - red/yellow
RR- - brown/white
LR+ - blue/yellow
LR- - gray/white

I would also use the batt. to pulse the rear speakers right at the speakers, to confirm they work.94

Will_GT90

I tested them using these colors:
http://www.installdr.com/InstallDocs...PDF/466005.pdf

RR+ = Red/Yellow
RR- = Brown/White
LR+ = Blue/yellow
LR- = Gray/white

test confirms, so still looks like bad wiring, no luck on finding a loose wire in the trunk, fear I'll just need to buy wire and rip apart my interior now

joeshmo

Here's what I would do. Take a little speaker or a test light (I think this works with a test light, I've done it with a multimeter before.) Tap into the wiring right out of the back of the stereo where the stereo harness splices into the stock to aftermarket harness. See if you are getting any sound out of the wires posted above by reading the voltage across the wires (it will fluctuate and be very small, but any reading means there should be sound) or by connecting your little speaker to those wires. Alternatively, short those wires to themselves and listen as the front speakers distort (as they should if the rear speakers are getting power.)

Also, if you have a multimeter and a piece of long wire, you can check continuity on the speaker wires to the trunk by reading the resistance. Infinite resistance means there is a break somewhere.

fcm

Before you start taking your car apart, test the speakers at the speaker, confirm the speaker is still good, the 9V batt. will pop the speaker real good, if it does then you have a connection problem, if not then the speakers are blown.

If the speakers are good, you can try and find the "break", it is pretty easy to access the wiring harness.

Again, before you start taking the car apart test the rear outputs on the HU, as mentioned, the small speaker, [or any known working speaker] is the best way, the test light will not light up until you drive the HUs amp into clipping, you really do not want to do that, even less so do you want to touch any output leads together or to anything other then a 2-16 ohm load and then only in pairs.

You installed a new unit, "Stock audio other than new head unit" and your rear speakers do not work, maybe the problem is the new HU. 94

Will_GT90

haven't gotten either speaker to 'pop' via battery, nor can I get either sets of rear speaker wires to give me any readings, I'm thinking possibly my rear speaker wires were shorted out and blew both rear speakers, is this possible/probable?

Dave88LX

I NEED CLOSURE ON THIS!

LOL. Found this searching, as I have the exact same problem in my '05 Civic. Pulled out an old JVC that came in the car, all speakers were working. Hooked up the two pigtails (from car/from head unit), and no rear sound. I don't get it.

fcm

Either the "new" HU rear outputs are NG, your faded all the way to the front, or you miswired the "new HU, check rear speaker wire connections to the "new" HU.

Wire color is the same as OPs 99 Civic as I posted above. 94

Dave88LX

Figured out the problem -- I'm just a huge idiot.

For some odd reason both rear speakers were disconnected under the rear shelf. I don't recall disconnecting them; either that I was drunk, no idea. Plugged them back in and voila.

cts92

question I hooked up a new alpine in my 94 accord lx and the speakers will randomly work if the key is turned to get battery power but as soon as I start it the don't work cant for the life of me figure it out!!!!! PLEASE HELPPPP

spenceyd

are the speakers new or the stock ones?

cts92

Check all speakers my right side speaker was grounded and somehow getting powere so the stereo its self would shut down so it doesnt blow! Just saying deck would work everything was on but no sound

Timmy Jarosick

I have the exact same problem on my 2012 civic! I was thinking of just connecting my rear speaker's to my front ones and leaving my sound settings turned to the front. Can you do this or will it blow the fuses?

AaronP860

That is a very odd problem, I have hooked up many many stereos and dont belive i have ever run into that sort of problem. Honestly a simple fix is just straight up to run new wires back to the speakers. just look and make sure you have the correct color for the rear speakers and from your radios wire harness run a (+) and a (-) for each speaker. If you were the one who hooked up the stereo from the jump then you should know that this is really an easy thing to do, honestly the hardest thing to do is hide the wires all the way back but if you have ever ran wires for an amp then you know this is simple really as well. What i would recomend though before taking your time and running speaker wires all the way to the back and hiding them neatly and whatnot is just a test.. take an extra speaker if you have one and do as i said and run a positive and neg, hook them up to the rear speaker wires on the harness coming from the radio itself and make sure that it is working. Just to be safe before you do all the work of runing the wires and taking the time to hide everything you know. But as long as you hook the wire from the stereos harness to the speaker, concidering that this works then yoou can go ahead and run the wires.. This is an easy fix. I have never had to do this but its a simple way of doing it. As long as you are not having any other problems having to do with the wiring issue then it wont be a problem, What i meen is tail lights work and everything else like that. But i thought i would just throw my two cents in there. hope i was helpful.